10 Similarly, the death of either the principal or the agent before the latter commences to act extinguishes the agent's authority; but equity has so far modified this rule that if, after the death of a principal and without having notice of his decease, an agent executes his commission, he can sue on the agency: for otherwise the law would be penalizing a reasonable and unavoidable ignorance. Similar to this is the rule, that debtors who pay a manumitted steward, say, of Titius, without notice of his manumission, are discharged from liability, though by the strict letter of the law they are not discharged, because they have not paid the person whom they were bound to pay. 11 It is open to every one to decline a commission of agency, but acceptance must be followed by execution, or by a prompt resignation, in order to enable the principal to carry out his purpose either personally or by the appointment of another agent. Unless the resignation is made in such time that the principal can attain his object without suffering any prejudice, an action will lie at his suit, in default of proof by the agent that he could not resign before, or that his resignation, though inconvenient, was justifiable. 12 A commission of agency may be made to take effect from a specified future day, or may be subject to a condition. 13 Finally, it should be observed that unless the agent's services are gratuitous, the relation between him and the principal will not be agency proper, but some other kind of contract; for if a remuneration is fixed, the contract is one of hiring. And generally we may say that in all cases where, supposing a man's services are gratuitous, there would be a contract of agency or deposit, there is held to be a contract of hiring if remuneration is agreed upon; consequently, if you give clothes to a fuller to clean or to finish, or to a tailor to mend, without agreeing upon or promising any remuneration, you can be sued by the action on agency. TITLE XXVII. OF QUASI-CONTRACTUAL OBLIGATION Having enumerated the different kinds of contracts, let us now examine those obligations also which do not originate, properly speaking, in contract, but which, as they do not arise from a delict, seem to be quasicontractual.